Valve mechanism for blowpipes and the like burners.



J. HARRIS.

VALVE MECHANISM FOR BLOWPIPES AND THE LIKE BURNERS.

APPLICATION FILED .IAN.2. I917- & 9 A M m j E/ I.

accompanying drawings.

n STATES PATENT OFFICE.

JOHN HARRIS, 0E CLEVELAND, OHIO, ASSIGNOR TO CARBO-HYDROGEN COMPANY OF AMERICA, 0F PITTSBURGH, PENNSYLVANIA. A CORPORATION OF DELAWARE.

VALVE MECHANISM FOR BLOWPIPES AND THE LIKE BURNERS.

' Specification of Letters Patent.

Patented Aug. 27, 1918.

Original application filed December 17, 1914, Serial No. 877,649. Divided and this application filed January 2,

1 1917. Serial No. 140,112.

To all whom it may concern Be it known that I, JOHN Harms, a citizen of the United States, residing at Cleve land, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Valve Mechanism for Blowpipes and the like Burners, of which the following is a full, clear, and exact description, reference being had to the This invention relates to blow pipes or torches such as are employed for the purpose of cutting metal with oxygen. In the operation of such torches, the metal is pre-' heated by means of a mixture of oxygen and a combustible gas, preferably directed from a. head having passageways therein connecting with achamber containing such mix ture, the oxygen for cutting the metal thus preheated being also supplied from the head thromgh a passageway delivering the oxygen in proper relation to-the preheating jets issuing from the first mentioned passageways. The oxygen and combustible gas are conducted through this head by means of pipes and, in the embodiment of my invention herein set forth, special valve mechanism is provided for controlling the flow of oxygen and combustible gases through the aforesaid pipes.

It is a general object of my invention to provide a blow ipe or torch of the general character descri ed with an extremely efficient and convenient arrangement of valve mechanism whereby the efiiciency of such blow ipes will be enhanced. Further and more limited objects of my invention will appear in thespecification and will be embodied in the combinations of elements included in the claims hereto annexed.

In the drawings forming a part hereof,

Figure 1 represents a side elevation of the torch or blowpipe having my valve mecha- Fig. 2, th'e'valve and stem being shown in Y passageway 1, the

elevation; and Fig. 6 a vertical sectional view of the valvedconnection for combustible gas, the valve proper being shown in elevation.

Describing by reference characters the various parts illustrated herein, A represents generally the head of the torch or blowpipe; B a tubular handle for operating the same; G the connection through which the oxygen 1s supplied to the head for preheating and cutting purposes, and D the connection for the combustible gas.

The burner head comprises a body'c having connected thereto a detachable tip a' and having a lateral extension a which is preferably cast with the head proper and provided with a plurality of passageways arranged to supply oxygen for the cuttin jet and for the preheating mixture as wel as the combustible gas or ases mingled with the oxygen for the production of the preheating flame. For convenience of description, the blow pipe or torch will be considered. as operated in the position shown in v municating with an annular chamber 4 said head by means of ports 5 in the outer portion of the tip as well as with a passageway 6 extending through a head on the inner portion of the tip. The head is provided with three passageways, 7, 8 and 9, communicating respectively with the central passageway 6, and the chamber 4.

27 28 and 29 denote three tubes which are connected to the lateral extension (1 of the head A and which communicate respectively with the passageways 7, 8 and 9. These tubes at their rear end (the ends remote from the head A) are connected to the valve body'E which contains a. chamber, passage- Ways, and a cooperating. valve constructed for'controlling the flow of oxygen and combustible gas to the blowpipe head. The

tubular handle B is sleeved at its rear end upon the body Eand at'fits front end upon' a suitable support "30 which is provided with apertures for the tubes 27, 28 and 29.

The detailed construction of the blowpipe head forms the subject matter of my application No. 71,626, filedqJan 12, 1916,

and this application is a division of my application No. 877,649 filed December 17, 1914 (Patent No. 1,217,119 issued February 20, 1917).

The body E is a casting containing passageways for supplying oxygen to the tubes 27, and 28 and a passageway for supplying combustible fluid to the tube 29. In its front end it is provided with a rib'31 having tapered recesses 32, 33 and 34 whcreinto the rear ends of the tubes 27, 28 and 29 are swaged, after which the may be permanently connected as by so der or in any approved manner. At its rear end, the valve body E is provided with a connection 35, preferably cast integral therewith and constituting an extension thereof and which connection is adapted to have coupled thereto the flexible tube through which oxygen is conducted to the tube 27.

Also cast with the body E is an extension 36 having an internally threaded bore 37 for the reception of a connection 38 to which a pipe or flexible tube for combustible gas may be secured. The connection 38 is provided with a passageway 39 therethrough, said passageway being controlled by a valve 40.

Also preferably cast integral with the body E is an extension 41, said extension having a large bore .42 therewithin providing a chamber for the reception of a valve 43. The extension 41 is threaded at its outer end for the reception of a cap 44, the chamber 42 receiving therewithin a spring 45 adapted to bear at one end against a packing 44 within the cap and its other end against the valve, thereby retaining the valve in contact with the annular seat 46 surrounding the inlet end of the passageway 47 extending from the chamber '42. From the passage 47 the passageway 48 extends to the pipe 27.

The extension 35 is provided with a passageway 49 leading to, the chamber 42. I

For the purpose of operating the valve 43 to permit the flow of oxygen from the passageway 49 to the pipe 27 and thence to the appropriate passageway in the blow pipe head, I mount an operating stem 50 within the passageway 47, extending said stem through the body E and providing a leak-proof joint by means of a plug 51 through which the outer end of the stem 50 projects, the plug being threaded into the body andserving to compress packing material 52 about the stem. For the purpose of operatin the stem, a lever 53 is pivoted to the body a between a pair of lugs 54, the 65 end of the lever being'preferably curved, as

indicated at 55, whereby it will substantially abut against the body'E- when the valve 43 is seated by the spring 45.

The body E is also provided with a pas sagew. y 56 extending laterally from the chamber 42 and communicating with a passageway 57 having a valve seat 58 controlled by a valve of the needle type. This valve will be preferably a valve such as shown in my application No. 877,649 filed Dec. 17 1914 and shown, described and claimed in my application No. 14,536 filed March 15, 1915; this valve comprises-generally a stem 59 which is threaded into the body E and is provided with an operating wheel 60. At its inner end the stem is provided with a rounded head 61 on which the valve tip 62 is mounted, the valve tip having a needle point coiiperating with the seat 58 and having a recess to receive the rounded head 61, the metal. at the outer end of the tip being bent inwardly about the head 61, as show at 63. The valve tip 62 extends across a c amber 64, and a passageway 65 leads from this chamber to the pipe 28. The valve 40 is preferably of the same construction as the valve just described and its tip coiiperates with a seat 66 at the discharge end of the passageway 67, which in turn communicates with the passageway 39. From the chamber 68 which surrounds the valve tip 40, a passageway 69 extends to and forms a continuation of the passageway 70 within the extension 36, the passageway 69 conductingcombustible gas to the pipe 29.

In the operation of the blowpipe, combustible gas will be conducted through the apertures 5 into the chamber 3 by merely opening the valve 40. The valve 59 will then be opened, admitting a supply of oxygen through the pipe 28 to the chamber 3 by means of the passageway 49, chamber 42 passageways 56, 57, chamber 64 and passageway 65. The metal having been preheated to the desired extent, the operator, holding the torch by the handle B, closes his hand against the lever 53 thereby unseating the valve 43 and allowin oxygen from the chamber 42 to flow through the passageways 47 and 48 into the tube 27 and thence through the central passageway of the blowpipe head.

The construction of the valve mechanism described and claimed herein is in some respects identical with the construction shown in my application No. 877,649, filed Dec. 17, 1914, and in my application No. 71,626, filed January 12, 1916.

Having thus described my invention, what I claim is 1; In a blowpipe, the combination, with a head having passagewaysfor supplying oxygen and a mixture thereof with a combus. tible gas, respectively, to jets, of a valve body having therein a valve-controlled pasemma sageway for combustible gas and an inlet therefor,

passageway for oxygen, a chamber 00mmunicating with the second passageway, an

annular valve seat in said chamber, a valve in said chamber, a spring in said chamber normally holding said valve against said seat, a passageway for cutting oxygen extending through said seat and an operating stem therein, a passageway leading from the last-mentioned passageway to the oxygen passageway in said ead, a valve-controlled passageway for heating oxygen extending from said chamber and'conductlng oxygen to the mixture passageway or passageways in said head, and means for operating said stem to unseat said valve.

2. As a 'means for supplying a combustible gas and oxygen to a blowpipe, a valve body having a through passageway for com: bustible gas and an inlet passageway for oxygen, a chamber whereinto said inlet passageway discharges, a valve seat at one end of said chamber, a valve in said chamber, a Spring normally holding said valve upon said seat, a passageway for heating oxygen extending from said chamber and a valve therefor, a second passageway for cutting oxygen extending from sald chamber and through the valve seat and having a stem therein, a passageway leading from the lastmentioned passageway, and means carried by said body and extending across the outer end of said stem whereby the valve in the chamber may be unseated.

3. As a means for supplying a combustible gas and oxygen to a blowpipe, a valve body having a through passageway for combustible gas, a valved connection adapted to communicate with said passageway, said body also having an inlet passageway therein for oxygen, a chamber whereinto said in let passageway discharges, an annular valve seat at one end of said chamber, a valve in said chamber cooperating with said seat, a spring normally holding said valve upon said seat, a passageway or heating oxygen extending from said chamber and a valve a passageway for cutting oxygen extending from said chamber through the valve seat and having a valve-operating stem therein, .a passageway leading from the last mentioned passageway, and a lever carried by said body and operatively engaging said stemto unseat the valve in said chamber.

4. As a means for supplying oxygen to the head of a cutting blowpipe or torch, a valve body having a chamber therein and means for supplying oxygen thereto, said chamber having at one end thereof an annular valve seat and a passageway for cutting oxygen extending through and away from said seat and a passageway for heating oxygen extending from said chamber, a valve in said chamber cooperating with said seat, means normally holding said valve on said seat, a valve-operating stem in the first mentioned passageway, and a passageway extending from the second passageway for the purpose of conducting heating oxygen to the blowpipe head, said body having a valve controlling the second passageway.

5. As a means for supplying oxygen for preheating and cutting purposes to a blow pipe head, a valve body having a chamber therein, said chamber having at one end thereof a seat, a valve in said chamber cooperating with said seat, means in said chamber normally holding said valve upon said seat, said body having an inlet passageway communicating with said chamber, a valve-controlled passageway for heating oxygen leading from said chamber, a passageway for cutting oxygen extending through and away from said seat, a passageway communicating'with the last mentioned passageway for conducting cutting oxygen to such head, a valve-operating stem in the passageway which extends through the seat,

and means carried by saidbody for operating said stem. v In testimony whereof, I hereunto aflixmy signature.

' JOHN HARRIS. 

